VIXS
31-07-2007, 10:04 PM
Hi There All
I have a Uniflare Dx unit at work and its lost all its charge (R407c)
I have spoken to Unflare and they say you must charge the unit untill there is no more bubbles in the sight glass.
Now i know this is how things were done in the old days but i think we have moved on and the manufacturer should be able to tell you how much charge in kg is needed.
I have looked at the commisioning sheets and it says 32kg, i think this is crazy because the unit is a 30kw serving one circuit with a condensor 55 meters away.
I phoned the installation company and they say no it must be 22kg.
I have tried charging the unit untill all bubbles are gone but that does not work because the unit took 35kg.
Please tell me if i am wrong but when you have a externally equalized electronic expansion valve and a variable fan speed controller on the condensor fan and the possiblity of your filter drier creating a small amount of bubbles, does this not make it very hard to get the correct amount of gas.
I will try to charge the unit going according to the superheat value of 7. does this sound like a good idea........
I have a Uniflare Dx unit at work and its lost all its charge (R407c)
I have spoken to Unflare and they say you must charge the unit untill there is no more bubbles in the sight glass.
Now i know this is how things were done in the old days but i think we have moved on and the manufacturer should be able to tell you how much charge in kg is needed.
I have looked at the commisioning sheets and it says 32kg, i think this is crazy because the unit is a 30kw serving one circuit with a condensor 55 meters away.
I phoned the installation company and they say no it must be 22kg.
I have tried charging the unit untill all bubbles are gone but that does not work because the unit took 35kg.
Please tell me if i am wrong but when you have a externally equalized electronic expansion valve and a variable fan speed controller on the condensor fan and the possiblity of your filter drier creating a small amount of bubbles, does this not make it very hard to get the correct amount of gas.
I will try to charge the unit going according to the superheat value of 7. does this sound like a good idea........